noun
headset (for phones, etc.)
Refers to a combined headphone and microphone device used for calls, gaming, or online meetings.
コールセンターのスタッフは全員ヘッドセットを着けている。
All call center staff wear headsets.
noun
headset (bicycle)
Bicycle component that connects the fork to the frame and allows steering; a technical cycling term.
The bicycle headset has developed play, so it needs to be replaced.